Can Perchlorate spread underground to other non-contaminated wells?
Yes. Perchlorate is spreading through the Rialto-Colton Groundwater Basin underground, generally migrating towards Colton from the vicinity of the Mid-Valley Sanitary Landfill in Rialto. However, the Basin has geologic barriers called impermeable faults on the Fontana and Lytle Creek sides, which generally prevent the perchlorate plume from moving out of the Basin in those directions. Click here to see a diagram of the ground water basin.
